Sigma 20mm F1.4 DG DN Art Sony E-mount

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Sigma 20mm F1.4 DG DN Art F Sony E-mount

The Sigma 20mm F1.4 DG DN Art F is a lightweight prime lens that delivers exceptional optical performance in the most demanding situations. Thus, this Sigma lens is the ideal choice for astrophotography, thanks to its sharpness from corner to corner, even at full aperture.

Optical performance

The lens system of the Sigma 20mm F1.4 DG DN Art F features 2 SLD elements, 3 aspherical glass elements as well as a large double-sided aspherical glass element. With this, the lens effortlessly suppresses optical aberrations such as sagittal coma flare and image distortions, allowing the lens to meet the high demands of the professional photographer.

Perfect results under demanding conditions

When the conditions you're shooting in demand a lot of attention or can affect your images, it's nice if your lens gives you a hand with this. For example, the lens is equipped with a manual focus lock switch. This easily disables the focus ring, so you don't have to worry about the focus distance changing. Ideal when you have exactly the starry sky in focus above you.

In addition, the design of the lens makes it easy to attach a lens warmer. With a lens warmer, you prevent internal condensation while shooting in the cold. For example, when you get started during a clear night.

Excellent structural quality

The Sigma 20mm F1.4 DG DN Art F features a robust body with a dust- and splash-proof structure. The front glass element also has a water- and oil-repellent coating.

The housing is made of aluminium combined with Thermally Stable Composite (TSC). This ensures the sleek finish of the lens. The convenient features, such as the focus mode switch, customizable AFL button and aperture ring lock are easy to operate and make the Sigma 20mm F1.4 DG DN Art F a very user-friendly, yet high-quality lens for the discerning photographer.

Features of the Sigma 20mm F1.4 DG DN Art F

  • Bright prime lens
  • Ideal for astrophotography
  • Focal length: 20 mm
  • Maximum aperture: f/1.4
  • Minimum aperture: f/16
  • Aperture blades: 11
  • 17 elements in 15 groups
  • Viewing angle: 94.5°
  • Minimum focus distance: 23 cm
  • Maximum magnification factor: 1:6.1
  • Filter size: 82 mm
  • Dimensions(?xL): 87.8 x 111.2 mm
  • Weight: 635 g


  • Sigma 20mm F1.4 DG DN Art F Sony E-mount
  • Lens caps
  • Lens hood





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Fixed focal length (mm)20.0Focal point
Minimum focal length (mm)20.0Focal point
Maximum focal length (mm)20.0Focal point
Fixed focal pointJaFocal point
Number of aperture bladesAperture
Maximum aperture (f)1.4Aperture
Minimum aperture (f)Aperture
Aperture of 2.8 or fasterJaAperture
Length (mm)111.0Size & Packaging
Max. viewing angle (degrees)94.5Lens & Zoom
Lens structure (elements/groups)Lens system
Number of aspherical lens elementsLens system
Other special lens elementsLens system
CoatingsLens system
LensmountSony ETechnical specs
Filter size (mm)82.0Technical specs
Dust & splash proofJaTechnical specs
Magnification factorZoom & Stabilisation